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Title: Characterization of supersonic radiation diffusion waves

Journal Article · · Journal of Quantitative Spectroscopy and Radiative Transfer

Supersonic and diffusive radiation flow is an important test problem for the radiative transfer models used in radiation-hydrodynamics computer codes owing to solutions being accessible via analytic and numeric methods. We present experimental results with which we compare these solutions by studying supersonic and diffusive flow in the laboratory. Here, we present results of higher-accuracy experiments than previously possible studying radiation flow through up to 7 high-temperature mean free paths of low-density, chlorine-doped polystyrene foam and silicon dioxide aerogel contained by an Au tube. Measurements of the heat front position and absolute measurements of the x-ray emission arrival at the end of the tube are used to test numerical and analytical models. We find excellent absolute agreement with simulations provided that the opacity and the equation of state are adjusted within expected uncertainties; analytical models provide a good phenomenological match to measurements but are not in quantitative agreement due to their limited scope.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP); UK Ministry of Defence
Grant/Contract Number:
AC52-06NA25396; AC52-07NA273444; AC52-006NA25396
OSTI ID:
1430025
Alternate ID(s):
OSTI ID: 1246414
Report Number(s):
LA-UR-18-22001; TRN: US1802991
Journal Information:
Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 159, Issue C; ISSN 0022-4073
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (4)

Absolute Hugoniot measurements for CH foams in the 2–9 Mbar range journal March 2018
One-Dimensional Models for Time-Dependent Transport in Solid Cylinders journal September 2018
The Effect of Ionic Correlations on Radiative Properties in the Solar Interior and Terrestrial Experiments journal April 2018
Absolute Hugoniot Measurements for CH Foams in the 2-9 MBAR Range conference June 2018